下图中通道3为上图中DR77(Vfb,UC2844第2pin)处电压AC输入波形,想问一下一前一后两个波峰分别对应了电源的什么动作状态,并且这个波形是否可以说明作为反馈的光耦是工作在线性状态?如果只通过调整反馈电阻DR81,DR82使输出电压从5V变为5.2V,会间接带来哪些后果,请指教,谢谢。。。
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